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Equity and Distributions, Distributions (Details) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Distributions to Partners [Abstract] |  |
Number of Designated Units to be excluded from distributions during 2014 | 22,560,000 |
Number of Designated Units to be excluded from distributions during 2015 | 17,690,000 |
Cash Distribution [Member] | First Quarter 2014 Distribution [Member] |  |
Distributions to Partners [Abstract] |  |
Distribution Per Common Unit (in dollars per unit) | $ 0.7100 |
Record Date | Apr. 30, 2014 |
Payment Date | May 07, 2014 |
Cash Distribution [Member] | First Quarter 2013 Distribution [Member] |  |
Distributions to Partners [Abstract] |  |
Distribution Per Common Unit (in dollars per unit) |  | $ 0.6700
Record Date | Apr. 30, 2013 |
Payment Date | May 07, 2013 |

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- Definition The number of common units outstanding (the Designated Units) on which a private held affiliate agreed to temporarily waive regular quarterly cash distributions it would otherwise receive, for a five-year period after the merger beginning November 22, 2010. + References No definition available. + Details
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- Definition Date of record for distribution of cash or unit to limited partner of limited partnership (LP), in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 + Details
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